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|
{- git-annex v0 -> v1 upgrade support
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Upgrade.V0 where
import System.IO.Error (try)
import System.Directory
import Control.Monad.State (liftIO)
import Control.Monad (filterM, forM_)
import System.Posix.Files
import System.FilePath
import Content
import Types
import Locations
import qualified GitRepo as Git
import qualified Annex
import Messages
import Utility
import qualified Upgrade.V1
upgrade :: Annex Bool
upgrade = do
showSideAction "Upgrading object directory layout v0 to v1..."
g <- Annex.gitRepo
-- do the reorganisation of the key files
let olddir = gitAnnexDir g
keys <- getKeysPresent0 olddir
forM_ keys $ \k -> moveAnnex k $ olddir </> keyFile0 k
-- update the symlinks to the key files
files <- liftIO $ Git.inRepo g [Git.workTree g]
fixlinks files
Annex.queueRun
-- Few people had v0 repos, so go the long way around from 0 -> 1 -> 2
Upgrade.V1.upgrade
where
fixlinks [] = return ()
fixlinks (f:fs) = do
r <- lookupFile0 f
case r of
Nothing -> return ()
Just (k, _) -> do
link <- calcGitLink f k
liftIO $ removeFile f
liftIO $ createSymbolicLink link f
Annex.queue "add" [Param "--"] f
fixlinks fs
-- these stayed unchanged between v0 and v1
keyFile0 :: Key -> FilePath
keyFile0 = Upgrade.V1.keyFile1
fileKey0 :: FilePath -> Key
fileKey0 = Upgrade.V1.fileKey1
lookupFile0 :: FilePath -> Annex (Maybe (Key, Backend Annex))
lookupFile0 = Upgrade.V1.lookupFile1
getKeysPresent0 :: FilePath -> Annex [Key]
getKeysPresent0 dir = do
exists <- liftIO $ doesDirectoryExist dir
if (not exists)
then return []
else do
contents <- liftIO $ getDirectoryContents dir
files <- liftIO $ filterM present contents
return $ map fileKey0 files
where
present d = do
result <- try $
getFileStatus $ dir ++ "/" ++ takeFileName d
case result of
Right s -> return $ isRegularFile s
Left _ -> return False
|
